Come up with cgraph_node::get_uid and make cgraph_node::uid private.

Come up with cgraph_node::get_uid and make cgraph_node::uid private.

2018-06-08  Martin Liska  <mliska@suse.cz>

	* cgraph.c (function_version_hasher::hash): Use
	cgraph_node::get_uid ().
	(function_version_hasher::equal):
	* cgraph.h (cgraph_node::get_uid): New method.
	* ipa-inline.c (update_caller_keys): Use
	cgraph_node::get_uid ().
	(update_callee_keys): Likewise.
	* ipa-utils.c (searchc): Likewise.
	(ipa_reduced_postorder): Likewise.
	* lto-cgraph.c (input_node): Likewise.
	* passes.c (is_pass_explicitly_enabled_or_disabled): Likewise.
	* symbol-summary.h (symtab_insertion): Likewise.
	(symtab_removal): Likewise.
	(symtab_duplication): Likewise.
	* tree-pretty-print.c (dump_function_header): Likewise.
	* tree-sra.c (convert_callers_for_node): Likewise.

From-SVN: r261320